Carilah sudut vektor a =(-3,1,3) dan b =(3,3,2).
Matematika
nizashofa
Pertanyaan
Carilah sudut vektor a =(-3,1,3) dan b =(3,3,2).
1 Jawaban
-
1. Jawaban dindadam46
|a| = V(9+1+9) = V19
|b| = V(9+9+4) = V22
a.b = (-3)(3) + (1)(3) + (3)(2) = -9 + 3 + 6 = 0
a.b = |a| |b| cos x
0 = V19. V22 . cos x
cos x = 0
x = 90, x = 270